表达式3: "z" equals 2 pi plus arc tangent left parenthesis, StartFraction, "y" Over "x" , EndFraction , right parenthesis left brace, "x" squared plus "y" squared less than or equal to 1 , right brace left brace, "z" less than 2 pi , right bracez=2π+arctanyxx2+y2≤1z<2π
3
表达式4: left parenthesis, 0 , 0 , left bracket, 0 , 2 pi , right bracket , right parenthesis0,0,0,2π
equals=
left parenthesis, 0 , 0 , 0 , right parenthesis0,0,0
left parenthesis, 0 , 0 , 6.2 8 3 , right parenthesis0,0,6.283
4
表达式5: left parenthesis, 0 , "t" , StartFraction, pi Over 2 , EndFraction , right parenthesis0,t,π2
定义域t最小值： negative 1−1
less than or equal to "t" less than or equal to≤t≤
